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Japan: Data Breach Incidents by Country / region

Search incidents by company, country, industry, year and attack method. Review affected data, impact, verification status, company responses and sources.

Country / region: JapanReset
767 results
CardsTable
Title / subjectOrganizationsVerificationReported impactDisclosed
Uonuma City: Arcadia intrusion may have exposed fire-notification registrant data魚沼市InvestigatingUnknown2026-10-15
Katano City: SpeeCAN RAIDEN intrusion may have exposed notification registrant data交野市InvestigatingUnknown2026-10-15
Hida City: Arcadia intrusion may have exposed NET119 and 119RAIDEN registrant data飛騨市InvestigatingUnknown2026-10-15
Burger King Japan: about 11.18 million app member records leakedビーケー・ジャパンConfirmedUnknown2026-10-15
Tosashimizu City: Arcadia intrusion may have exposed disaster-notification registrant data土佐清水市InvestigatingUnknown2026-10-15
Ichikai Town: vendor intrusion may have exposed disaster-mail registrant data市貝町InvestigatingUnknown2026-10-15
Hamamatsu City: Arcadia intrusion may have exposed fire-info delivery and Net119 registrant data浜松市InvestigatingUnknown2026-10-15
Matsuyama City: SpeeCAN RAIDEN intrusion may have exposed notification registrant data松山市InvestigatingUnknown2026-10-15
Kishiwada City: Arcadia intrusion may have exposed multiple emergency-notification registrant datasets岸和田市InvestigatingUnknown2026-10-15
Usuki City: vendor intrusion may have exposed fire-mail data on 721 people and NET119 registrant data臼杵市InvestigatingUnknown2026-10-15
Yamatotakada City: vendor intrusion may have exposed registrant email, name, phone and FAX大和高田市InvestigatingUnknown2026-10-15
Osumi-Kimotsuki Fire Union: Arcadia intrusion may have exposed notification registrant data大隅肝属地区消防組合InvestigatingUnknown2026-10-15
Kaizuka City: Arcadia intrusion may have exposed NET119 and 119RAIDEN registrant data貝塚市InvestigatingUnknown2026-10-15
Hadano City: vendor intrusion may have exposed emergency-mail and related registrant data秦野市InvestigatingUnknown2026-10-15
SourceNext: 22,519,960 member records leaked via abuse of member-data APIソースネクストConfirmed22,519,960 Records2026-10-15
Hasuda City: vendor intrusion may have exposed NET119 and 119RAIDEN registrant data蓮田市InvestigatingUnknown2026-10-15
Tomakomai City: SpeeCAN RAIDEN intrusion may have exposed notification registrant data苫小牧市InvestigatingUnknown2026-10-15
Shibata City: Arcadia intrusion may have exposed about 18,000 Anshin Mail registrations新発田市InvestigatingUnknown2026-10-15
Tsukumi City: vendor intrusion may have exposed notification registrant data津久見市InvestigatingUnknown2026-10-15
Niiza City: SpeeCAN RAIDEN intrusion may have exposed 1,206 safety-check and disaster-contact registrations新座市Investigating1,206 Records2026-10-15